Inventor
Stephen T. Shanahan
Inventor
Whittier, CA, US
Overview
Patents· 1 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
5,842,521'Downhole pressure relief valve for well pump'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998Patents assigned to BAKER HUGHES INC (1)· patent assignee history
1998Based in Whittier, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES INC | 1 | 1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Whittier, California, US | 1 | 1998 |